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United States of America Patent
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Feb 28, 2012
Grant Date -
Oct 11, 2007
app pub date -
Mar 8, 2007
filing date -
Apr 5, 2006
priority date (Note) -
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status (Latency Note)
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Abstract
A fluid flow control device (26, 28) comprising a guide member (30) to guide a fluid passing through a duct (22, 24, 76), the guide member (30) being movable between first and second positions; and an urging arrangement (32) capable of providing an urging force (F1) to urge the guide member (30) towards the first position, characterised in that the urging arrangement (32) is a resilient torsion bar that is formed so as to allow the guide member (30) to be moved towards the second position by a pressure force (F2) exceeding and opposite to the urging force (F1), the pressure force (F2) being provided by a pressure difference across the guide member (30).
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